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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Intel PMC Core platform init
- * Copyright (c) 2019, Google Inc.
- * Author - Rajat Jain
- *
- * This code instantiates platform devices for intel_pmc_core driver, only
- * on supported platforms that may not have the ACPI devices in the ACPI tables.
- * No new platforms should be added here, because we expect that new platforms
- * should all have the ACPI device, which is the preferred way of enumeration.
- */
- #include <linux/acpi.h>
- #include <linux/module.h>
- #include <linux/platform_device.h>
- #include <asm/cpu_device_id.h>
- #include <asm/intel-family.h>
- static void intel_pmc_core_release(struct device *dev)
- {
- kfree(dev);
- }
- static struct platform_device *pmc_core_device;
- /*
- * intel_pmc_core_platform_ids is the list of platforms where we want to
- * instantiate the platform_device if not already instantiated. This is
- * different than intel_pmc_core_ids in intel_pmc_core.c which is the
- * list of platforms that the driver supports for pmc_core device. The
- * other list may grow, but this list should not.
- */
- static const struct x86_cpu_id intel_pmc_core_platform_ids[] = {
- X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_L, &pmc_core_device),
- X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE, &pmc_core_device),
- X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE_L, &pmc_core_device),
- X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE, &pmc_core_device),
- X86_MATCH_INTEL_FAM6_MODEL(CANNONLAKE_L, &pmc_core_device),
- X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_L, &pmc_core_device),
- X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE, &pmc_core_device),
- X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE_L, &pmc_core_device),
- {}
- };
- MODULE_DEVICE_TABLE(x86cpu, intel_pmc_core_platform_ids);
- static int __init pmc_core_platform_init(void)
- {
- int retval;
- /* Skip creating the platform device if ACPI already has a device */
- if (acpi_dev_present("INT33A1", NULL, -1))
- return -ENODEV;
- if (!x86_match_cpu(intel_pmc_core_platform_ids))
- return -ENODEV;
- pmc_core_device = kzalloc(sizeof(*pmc_core_device), GFP_KERNEL);
- if (!pmc_core_device)
- return -ENOMEM;
- pmc_core_device->name = "intel_pmc_core";
- pmc_core_device->dev.release = intel_pmc_core_release;
- retval = platform_device_register(pmc_core_device);
- if (retval)
- platform_device_put(pmc_core_device);
- return retval;
- }
- static void __exit pmc_core_platform_exit(void)
- {
- platform_device_unregister(pmc_core_device);
- }
- module_init(pmc_core_platform_init);
- module_exit(pmc_core_platform_exit);
- MODULE_LICENSE("GPL v2");
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